Canon Powershot TX1 pocket digital camcorder

after searching on google it seems I am not alone in the problem I have
with my canon pocket camcorder, which has lost it's ability to focus
properly. I took the panels off and tried to tackle the problem myself
but I gave up as I was unable to see anything obvious. Before I submit
it to a company for a (perhaps costly) repair does anyone have
experience of fixing this problem? I'd like to have another go at it if
I know what to look for.
thanks for any advice.